Bicycle frame



FIG. 1 is a perspective view of a bicycle frame showing my new design;

FIG. 2 is a view from one side of the bicycle frame shown in FIG. 1;

FIG. 3 is a view from the opposite side of the bicycle frame shown in FIG. 1;

FIG. 4 is a front view of the bicycle frame shown in FIG. 1;

FIG. 5 is a rear view of the bicycle frame shown in FIG. 1;

FIG. 6 is a bottom plan view of the bicycle frame shown in FIG. 1; and,

FIG. 7 is a top plan view of the bicycle frame shown in FIG. 1.

The hinge, two brake bosses, two rear dropouts, head tube bracket, and an upper seat stay bracket are shown in broken lines for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a bicycle frame, as shown and described. 